Connect to old mysql server (4.0.20-standard) from php7 - php

Question

I want to connect to old mysql server (Server is 4.0.20-standard) with php7. Upgrade mysql server or downgrade php is not an option.
I'm doing this: $conn = mysqli_connect($local,$user,$pwd,$db,$port);
But i'm getting this error: Warning: mysqli_connect(): Connecting to 3.22, 3.23 & 4.0 is not supported. Server is 4.0.20-standard.
Is possible do that?

Answer 1

The mysql native client(mysqlnd) which has been the default mysql driver since php 5.4 does not support old mysql servers, if you still want to connect to old versions of mysql servers, you should use another mysql driver libmysqlclient, which is needed to be compiled with php.
Here is the introductions of these two drivers:
https://dev.mysql.com/doc/apis-php/en/apis-php-mysqlinfo.library.choosing.html
I recommend you to build your mysqli with libmysqlclient and build your pdo with mysqlnd which is the default one and is recommended by official, so that you can connect to both versions of mysql servers.

Answer 2

Solution (didactic solution, do not use this on production environment):
Step 1: Install putty.exe + plink.exe in php7 machine. Step 2: I created these methods to do all the job for you/me. Example1:
$query = "SELECT * FROM user";
$rs = select($query);
if($rs)
for($index = 0; $index < count($rs);$index++){
//ALWAYS use this. Now u can use that array like a normal resultset $rs["lalala"]
$row1 = $rs[$index];
//use this like usual
echo $rs["username"];
}
Example2:
$query = "SELECT * FROM user";
$rs = select($query);
if($rs)
for($index = 0; $index < count($rs);$index++){
//ALWAYS use this. Now u can use that array like a normal resultset $rs["lalala"]
//$row1 = $rs[$index];
//now you didn't the line above...
echo $rs[$index]["username"];//you'll need something like $rs[0]["username"]
}
For update/delete/insert you can use something similar to the insert method. Example 3:
if(m_insert("insert into user (name,pwd,email) values ('kkk', 'hahaha', 'email#lala.com');")){
echo "</br>true</br>";
} else {
echo "</br>false</br>";
}
Remember1: You need to change the method variables (host, database, username, password, etc)...
Remember2: Change the mysql credentials at this line $commands[0] = 'mysql -u username -pPASSWORD...'